Year per 1,000 female adults 1960 542.094 1961 537.624 1962 533.101 1963 529.476 1964 525.277 1965 516.081 1966 508.409 1967 499.696 1968 493.617 1969 487.581 1970 482.128 1971 475.446 1972 468.328 1973 460.786 1974 478.539 1975 571.864 1976 556.793 1977 575.398 1978 608.542 1979 597.918 1980 520.355 1981 505.057 1982 488.193 1983 476.704 1984 450.88 1985 449.371 1986 441.823 1987 426.901 1988 425.704 1989 386.355 1990 382.299 1991 380.268 1992 367.659 1993 358.373 1994 348.051 1995 347.543 1996 338.668 1997 329.971 1998 331.119 1999 354.068 2000 254.861 2001 246.251 2002 237.853 2003 230.092 2004 221.844 2005 215.024 2006 207.338 2007 200.407 2008 193.919 2009 188.611 2010 184.027 2011 179.993 2012 175.604 2013 171.341 2014 167.468 2015 163.928 2016 160.915 2017 157.959 2018 155.143 2019 152.451 2020 146.158 2021 156.549 2022 145.103